17
English
EN
M
Memory Stick
Memory Stick. A flash memory card for digital
storage on cameras, camcorders and other
handheld devices.
MMC Card
MultiMedia Card. A flash memory card that
provides storage for cellphones, PDAs and
other handheld devices. The card uses flash
memory for read/write applications or ROM
chips (ROM-MMC) for static information, the
latter widely used for adding applications to a
Palm PDA.
S
SD Card
Secure Digital Memory Card. A flash memory
card that provides storage for digital cameras,
cellphones and PDAs. SD Cards use the same
32 x 24mm form factor as the MultiMediaCard
(MMC), but are slightly thicker (2.1mm vs.
1.4mm), and SD Card readers accept both
formats. Cards up to 4GB are available.
T
Thumbnail
A thumbnail is reduced-size versions of a
picture that is used to make it easier to
recognize an them. Thumbnails serve the
same role for images as a normal text index
does for words.
11 Glossary
A
Aspect ratio
Aspect ratio refers to the length to height
ratio of TV screens. The ratio of a standard
TV is 4:3, while the ratio of a high-definition
or wide TV is 16:9. The letter box allows you
to enjoy a picture with a wider perspective on
a standard 4:3 screen.
J
JPEG
A very common digital still picture format.
A still-picture data compression system
proposed by the Joint Photographic Expert
Group, which features small decrease in image
quality in spite of its high compression ratio.
Files are recognized by their file extension
‘.jpg’ or ‘.jpeg.’
K
Kbps
Kilobits per second. A digital-data-rate
measurement system which is often used
with highly compressed formats such as AAC,
DAB, MP3 etc. The higher the amount, the
better the quality generally is.
Kensington lock
A Kensington Security Slot (also called a
K-Slot or Kensington lock). Part of an anti-
theft system. It is a small, metal-reinforced
hole found on almost all small or portable
computer and electronics equipment,
particularly on expensive and/or relatively light
ones, such as laptops, computer monitors,
desktop computers, gaming consoles, and
video projectors. It is used for attaching a
lock-and-cable apparatus, in particular those
from Kensington.
